Railway signaling.



1. 0. TAYLOR, own. M. E. TAYLOR. EXECUTRIX.

RAILWAY SIGNQUNG.

APPIEICATION FILED NOV. 18. m3. PatmedJune 1915 2 sne'mpsnzzr 1. I

FIG-.1

J. D. TAYLOR, DECD. M. EL TAYLOR. zxm umx. RAILWAY SIGNALING.

APPLICATION FILED "UV-13, 1913- 1,144,509. 1 Patented June 29, 1915 2 SHEETSSHEET 2.

N Q n I Q; x Q Q 3? a WITNESSES I mv: TOR

I will describe two forms of signaling" a y 5ST QFFIOE.

- was a. sermon, or WILKINSBUBG, rs'rmsrrvsmm msnr n. TAYLOR, EXECUTBIX 31' 3m 3631*? D. TAYLOE, DWEBSED, ASSIGNOB TO THE UNION SWITCH 6: SIGNAL comm, 0F SWISS'VALE, PENNSYLVANIA, .A GORPOBATION- 0F ?ENNSYLVANIL BAEWAY SIGNALING.

Specificatron of Letters Patent.

Patented June 29, 1915.

Application mearzovembeus. 1913. Serial No. 801,617.

' I?) all whom it mm; concern:

and State of Pennsylvania, have invented certain new and useful Improvements'in Biiailway Signaling, of which the followmg is a specification.

My invention relates to railway signaling,

and particularly to signaling for stretches offiingle track over which traflic' moves in both directions, such for example, as stretches of single track between passing sidings.

systemembodying my invention, and will then point. out the novel features thereof in claims.

In the accompanying drawings, Figure 1 is a diagrammatic view showing a stretch of single 'having applied thereto one form'ofsignahng system embodying my invention, the signals being automatically controlled as to the direction of trafiic by cars or trains approaching the stretch. Fig. 2 is a view similar to Fig. 1 but showing a modification in which the signals are controlled as to direction of trafic .by manuall operable means. Y

ircilar reference characters refer to similar partsin both of the views.

Excite first to Fig. 1, i k-B is a stretch ofsingle track'between two passing sidings E and F, over which-stretch trafiic moves in both directions. Traificthrough this stretch from east to west is governed y signals S15 and S located at intervals throu 'h the stretch, and trafilc through the stretc other signals 5, S and S, located also at intervals through the stretch. The stretch is divided into a plurality of sections -A-G, 0-D and DB, and as here shown a pair of opposing signals is located near each junctionof adjacent sections, but i do not wish to limit myself to this particular loco. tion of the signals. 7

Each section A-C; etc, is provided with a track circuit'comprising as usual the rails of the section, a track battery I), and some relay '1. Extending in each direction iron:

from west to east is governed by the-ends of the stretch A--B, is a prelirninary section A r-G or BH,each of which is also provided with a track circuit similar to that for eachof the sections of the main stretch.

For each signal- I-provide a signal relay for the control thereof; in the drawing, each signal relay is designated by the reference character R with an" exponent corresponding to the exponent of the signal which it controls. For example, signal S is controlled by relay R, signal S? by relay R etc. The circuit for signal S is from batte '1 through wire 2, contact 3 of reliag R wire 4, signal S, wire 5 to battery 1. e circuit for each of the other signals is similar.

In order to control the signals a'sto the direction of trafiic through the stretch A-B, I providetwo signal relay circuits, one of which includes the signalrelays for the signals governing tralfic in one. direction, and the other of which includes the signal relays for. the signals governing traffi'c in the other direction; and I provide means for energizing one or the other of these signal relay circuits at 'a'time, and for insuring that when either circuit is energized the other is denergiz'ed. As here shown, the several signal relays are connect ed inmultiple in their circuits, and the branch for each relay is controlled by neof the track relays. Thus the signal relays BF, R and R for the westbound signals are bridged in multiple across. a line wire 6 and a common wire 7, and the signal rela circuit thus formd .is at times supplied wit current from a'battery 9 at one end or the stretch, as hereinafter explained; and the signal relays R R and R" for the eastbound signals are bridged in multiple across a line wire 8 and the common wire 7, and the signal relay circuitthus formed is at times supplied with current from a battery 10, as hereinafter explained. The branch of the westbound signal relay circuit includs I ing relay R is from line wire 6 through wire 11, contact 12 of track relay .T, w1re al relay R wire 14 to common wire 7. T e branches for relays R auditv are similar to that for relay R except that the ixplained. Itwill be seen,.thereore, that the branch for each signal relay is 'con- K I rela ircuit open.

branch for relay 3 includes contacts 15'- of a polarized relay K fora purpose hereinafter explained. The branch'of the east-.-

bound si' relay circuitr.vwhich includes relay R is from-w re 8 through wire16,

contact 17 9f track relay T wire 18, relay R, wire 19 to common wire 7. The

branches for relays R and R are similar to.

that for relay R, except that the branch for relay It includes contacts-15 of a. ola'rlzed relay K for a purpose hereinaf ter trolled by the 'trackrelay for the section through. which the corresponding signal governs traflic, so'that when a section is oc-' cupied by a caror train, the circuits .for

both signals governing trafiic through that section are always open and the signals therefore indicate idanger.

The means which I have herein shown for controlling the supply of current. to the signal relay circuits comprises-the two polarized relays K and K, each-ofwhich includes a winding and a polarized armature 15 RelayK controls the circuit for signal-relays R 11* and R", and relay K 'controls the circuit-for signal relays R, R and B. When armature 15 of relay K is in the position shown, the upper terminal of battery '9 is connected with line wireo, the connect1on being through wire 20 and contacts 15"; the

lower terminal of battery 10 is'constantl connected with common wire 7, hence wit armature 15 in this position, relays'R, R and R? are energized. Obviously, when contact l5 swingstoit's other position the connection to wire 6 will be opened and signal relays R, R and R will be dcnergized. The circuit for signal relays R", R and R. is similarly controlled by polarized relay K.

The windings of the polarized relays K and K are included in series in a olreuit which is controlled by each ofthe trackrelays T, T and 'l of the stretch A+B, and means are provided for passing current through this circuit in one direction or the other,

This circuit is traced hereinafter. The polarized relays are so connected in this circuit that when current flows in one direction through the circuit, relay Kis ene 'cd in such directionas to:close the 4 al relay circuit and relay K conversely: when current flows in the other direction,' nelay K is energized in such di- 1 rection to; clpsethe eastbound signal relay circ'dit and relav K is energized in such direction'as to hold the westbound signal e"meansshown :n- Fig. 1 forcontrolling the polarized relays K and K" comprises 'the track relays T and T of the presystem.

'proaches the Stretch A-,-B.RAs this tr'arx fl opening o liminaly sectionsg When one of these track relays 1S opened-current is caused to flow throughthe windings of the polarized relays in one-direction, and. when the other track relay is opened, current is caused flo'w thron h thecircui-t in the other direc-v tion; A" etail'e'd explanation of this port1on of the system will appear in the fol lowing explanation oithe operation of the The operation of the system shown in Fig. 1- is as followsz 'with "t e polarized relays and K in the positions shown in the' drawing, the' westboimd signals are clear and the eastbound signals are at danger, -I will assume firstthat a westbound train ari-i' enters preliminary section QBQH the o ing of track relay'T causes" (2 iz j lays K and K to be energiz --throu ,7 following circuitfrombat'tery'9 thrcii gh 851 wire 21,'contact 22 of track relay ,wire 33, winding of polarized relay K, wir23oo1itact 24 of track relay T, wire 25, contact 26. w of track rela T wire 27, contact .28 of track relay wire 29, winding of polart0 ized relay K, wire 30, contact 31 (if-track relay'lfl'wim' 32 and commonwirei to battery 9. The direction of the currentiii this circuit is such that the armatiu tes 15 and 15 of the polarized relays remain" in the positions 'inxwhich they areg'shown'in change in the signals. As the -train-kinjttrs 1 section B-l), it opens track relay :lllfifthufie- 101 by opening at contact 43 the branch circuit including signal relay It, so that signal then chan es to danger indication. The

track relayv T also [0 'ens the; circuit including the windings of e polar 10g ized relays K and K, andvthis circuit con-1 tinues to be opened by one track relay or another as long as the train occupies any art of the stretch AB; consequentl as LI; ong as the trainis in anyfpart o the 11? stretch, the polarized relays cannot been-v ergized and therefore e eastbound si als S, S and S cannot v M the westbound signals S,v-S and S? cannot be taken away, from the"we'stbound train. In

-D-.C, track relay T closes, thereby permitting signal relay R ,to close, which latter in turn causes signal S to change to clear indication so that a following weal?" bound train may now enter the stretch A-B. The operation of the'apparatus during the passage; of the westbound through the remainder of the stretch will-be evident from the operation as thus far de-' scribed. v y

I will assume now that with the signals set as shown in the drawing, an ea train approaches the'stretch A-B. As this train enters preliminary section G-A, it opens track rela'y T',thereby causing polarized relays K and K to be ener through the, followingcircuit-from battery 10 through wire 34, contact 31-o track relay T, ;wire 30, winding of. polarized relay Kthence through the contacts of track relays T, E and T, as hereinbefore traced, then through windin of polarized relay K, wire 33, contact 22 of track relay T, wire 35, and common wire 7 to battery 10. The direction of current in this circuit is such as to cause the armatures 15 and 15 of the polarized relays to be reversed from the positions in which they are shown in the drawing, thereby causing westbound signals S, S and S to change to don er indication and eastbound signals S and S to change to clear indication. The operation of the apparatus during the passage of the eastbound train through the stretch is similar to that during the passage of the westbound train hereinbefore described, hence no further explanation is necessary.'

' As hereinberore mentioned, the branch circuit for signal relay 3 includes contacts 15' of polarized relay K, and the branch for signal relay It includes contacts 15? of 1 polarized relay K. The purpose of this control of these signal relays isas follows: If by accident the armatures 15 of the two polarized relays should get into' non-correspending positions-for example, if armature 15 of relay K should become reversed and armature 15 m? relay K shouldremain in the position shownthen the circuits for both relays R and it would be opened so that both end signals S and S? would be at danger and no train could enter the stretch from either direction. Of course,-ifarmature 15 of relay K should remain in the position shown, and the armature 15 of relay K should become reversed, all of the signal relays would be de'einergized and all of the signals would therefore indicate danger.

Referrin now to Fig. 2, the system here shown is t e same as that shown inFig. 1, except as to the means for controlling the signals as to direction of trailic, this control being accomplished in Fig". 2 by manually operable circuit controllers P and P instead of by the track relays of the preliminary sections as in Fig. 1. In Fig. 2, the prelimin sections are omitted and the circuit control ers P and P are substituted.

The-operation of the system shown in Fig.

2 is as follows: As shown in the drawing,

stbound thecontroilers P and P. areiset for a west bound tram to-pass through the stretch, the

circuit forpolarized relays K and K"being -from battery 9 through-wire 38, circuit con wire 3.7, circuit controller P, wires 40,32

and 7 to battery 9. To set the signals for an eastbound train to pass through the stretch requires that both circuit controllers P and P be reversed by arroperator at each endof the stretch. Current then flows from battery 10 through wire 86, .circuitcontroller P, wire 37, thence through the same circuit as before to circuit controller P, then through wires 41, 35 and 7. to battery 10. This current is in such direction as to cause annatures 15 of the polarized relays K and K to be reversed, thereby causing-thewestk at bound signals to change to, danger and-the eastbound si -als to change toclear. It will be note that when the signals are set for trafiic in one directionorthe other -rev versal of one or the other of the circuit contrailers-P or? by an operator at the com spending end will have no efiect onk-the signals. Reversal of the direction of traffic requires joint action on the part of both 0 erators, andthis joint action" may be c tamed by suitable communication ct any fOIIll, such as telegraph or telephone (which means for communication is .not shown in the drawing).

The features pointed -'out hereinbefore concerning the impossibility of reversing the signals while a train is in the stretch, and the protection against. false 0 eration" of the signals due to noncorresp on ing p05 s'itions of the polarized relay armatures 15 apply to the system shown in Fig. 2 aswell as to that shown in Fig.1 1.-

Although. I'have herein shown and described only two forms of railway signaling system embodying my invention, it is understood that various changes and modifications may be made, therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thusdcscribed my invention, what I claini is:

1; In combination, a stretch of single track, signals located at intervals for governing traffic in one direction through the stretch, and other signals located at intervals-for governing trat'fic in the other direction through the stretch, asignal relay for the control of each signal, track circuits for the stretch including track relays; a signal relay circuit including in multiple the signal relays for the signals which govern traffic in one direction, the branch for each signal relay being controlled by a track relay; another signal relay circuit including Iv ivlle'for governing tram 'tion'throu" the stretch, a signal relay for it? atta ns COPY being controlled by a track relafy; or

in'multiple" the signalrlays' a. the signals overnin in the other direction, the ranch or eadhof, the'latter signal relays being controlled by a track relay; and means for energizing one or the other or said signal relay circuits! a Incombination; a. wrath of s ngle track, signals located at intervals for goviermng traific in onedirection through the' stmtcm andwother located afiinterc inthe other directhdoontro of each signal, track circuits for tlie' stretch including track relays; a signal r'ohy circuit including in multiple the S1g-' relays for. the signals'which govern traflic-iirom direction, the branch for each signal relay being controlled by. a track relayfhnother signal rell zy circuit including l'n mult'iple the signal ays for the signals overningtrafiic in the other direction, the 'ranch-afor each. ofthe latter signal relays signals which govern trafiic .in the other direction, track circuits for-the stretch including tra'ck'relays for the control of said signal rela circuits, means, for energ z ng eachsigna relay circuit; a polarizedrelay foreachj signal relay circuit for causing the corresponding circuitto be energized or deenergized according as the relay is energized one direction or the other; .a,circuit for said polarized relays, the relaysbeing so connected in said circuit that when the circuit is 1 energized in one direction or they other, one or the other of the signal relay.

circuits is energized; and rneans'for energiz ing said olarlzed relay circuit in one directioniir t e other.

hails combination, a stretch of. single track, signals located at intervals for governing traific in one direction through "the stretch and other signals located at'intervals for governing t'raflic in the other direction through the stretch, a signal relayfo'r the control of each signal, a signal relay circnit for the relays for the signals which govcm traflic in one direction, another signal relay circuit for the relays forthe signals which govern trafiic in the other=direction,

track circa its for the stretch including track mlays for the control of said signal relay'cirand means.

'' suits, ineans for energizing each signal relay circuit, a polarized relay for each si a1 relay circuit for causing the correspon g i.

rection'orithe other; a circuit for said polarizcd relays, the relays beingso connected in said circuit that when the. circuit is energized in one direction or the other, one or gized; preliminary track" sections one extending from cach end of the stretch, and means controlled by 'a train inone preliminary section or the other for energizing said the other,

track, signals located at intervals for governing trailic in one direction through the circuit to be energized or'deenergized according as the relay is energized injone di-' ,the other of the signal relay circuits is ener polarized relaycircuit in one direction or 5. In combination, a stretch of single I stretch, fid j other signals located atlinter yals for gb erning 'traiiic in'the other direction through the stretch, a signal relay for the control of g the stretch inc ding track relays; a signal relay circuit including in multiple the signal relays for the'signals which govern traffic in one direction, the branch for each signal relay being controlled by a track relay;

ggch signal, track circuits for i another signal relay circuit including in multiple the signal relays for the signals governing traific in the other direction, the branch for each of the latter signal relays being controlled by a track relay;.a polarized'relay for'eachf signal relay circuit for causing the corresponding circuit to be energized or deenergized according as the polar- "lays, the relays being so-connccted in the circuit that when the circuit is-energized in f one-direction or the other, one or the otherof the signal relay circuits is energized; means for energizing said polarized relay circuit in one direction or the other, and a contact ofeach polarized relay included in the brtuich for one of the signal relays which is controlled by the other polarized relay. 6. In

track divided into a plurality of sections, a pair of opposing signals located substantially at each junction of adjacent sections combination, a stretch of single ized relay is energized in one direction on the other; a'clrcuit for-said polarized re-' for governing traific in opposite directions,

a signal relay for the control of'each signal, track circuits for the 1 sections including track relays; a signal relay circuit including in multiple the signalrelays for the signals which govern tra'flic" in one direction, the branch for each relay being-controlle'd bya track relay for the section-through which the corresponding signal governs tralfic;

another signal relay circuit including in multiple the signal relays for thesignals' which govern traffic in'the other direction,

the branch 01 each of the latter relays be- 7 mg controlled by a track relay for the Section through winch the correspondmg 51g- :ml governs. traffic; and means for emu-gliing 0112 01' the other of said. signal relay circuits In testimony whereof I arfix my signature in presence of two witnesses.

JOHN D. TAYLOR Witnesses:

R. L. Kls'rmm, A. HERMAN'WEGNER. 

